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Java与php共享Memcached存储数据中的有关问题与解决办法

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Java与php共享Memcached存储数据中的问题与解决方法

Java与php共享Memcached存储数据中的问题与解决方法

Posted by Demon at 05:57 上午 on 18, Aug 2010

php写入的数据java读不出来,java写入的数据php读取乱码;
如果你根据php提供的memcache扩展协议来自行编写java memcached client将不会有问题,我们这里提到的是使用
java的 MemCachedClient 包;

php_extension: php_memcache.dll / memcache.so
java_jar: MemCachedClient [com.danga.MemCached.*]
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解决方案:
经过查看MemCachedClient源码,发现是 set 时 flags不同,java是根据存储值类型来订flags的。

	public static final int MARKER_BYTE             = 1;
	public static final int MARKER_BOOLEAN          = 8192;
	public static final int MARKER_INTEGER          = 4;
	public static final int MARKER_LONG             = 16384;
	public static final int MARKER_CHARACTER        = 16;
	public static final int MARKER_STRING           = 32;
	public static final int MARKER_STRINGBUFFER     = 64;
	public static final int MARKER_FLOAT            = 128;
	public static final int MARKER_SHORT            = 256;
	public static final int MARKER_DOUBLE           = 512;
	public static final int MARKER_DATE             = 1024;
	public static final int MARKER_STRINGBUILDER    = 2048;
	public static final int MARKER_BYTEARR          = 4096;
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为了方便,两者间的数据转换使用JSON格式;
php与java在存储的时候值类型均要求为String类型,
并且php在$mem->set(key,value,32,expire);加粗部门要注意,这个是必须的。
然后php写入的数据,java那边就能够顺利读取了,当php写入array,object时,java读取后json.decode就OK了。

1 楼 maozilee 2011-10-12  
我的用JSON传递没有问题,MEMCACHE会自动判断和序列化。
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